Question: What is the tripping-man impact scenario for a nuclear weapons production technician?
Answer: A 280 lb production technician traveling 2 .5 miles per hour.
We are all familiar with the horrible impacts that nuclear weapons have on humans, but now we have an Analysis of Human Impacts on Weapons. The Defense Nuclear Facilities Safety Board (Board) recently reviewed the Hazard Analysis Reports (HARs) for several nuclear explosive operations at the Pantex Plant and found that Plant could have a weight problem with its production technicians (PTs).
Of concern is that the weapons design agency supplies data on weapons responses for “tripping-man impact scenarios” based on the energy imparted by a 280 lb PT traveling 2.5 miles per hour. Tools and parts could break if someone larger tripped into a warhead while going faster that 2.5 mph. And Pantex has no controls in place to limit these human impact energies.
The DNFSB concluded that the “maximum PT impact energy does not represent an uncontrolled environment, such as lightning, earthquake, or meteorological conditions.” Pantex imposes other physical qualifications for PTs (such as age, sight, speech), as well as other limitations specified by the Human Reliability Program. They believe that weapon responses should be reevaluated for higher impact energies, or that Pantex should limit PT weights.